Low storage and memory can lead to poor performance. Try uninstalling apps you don’t use or moving files to the cloud.
Troubleshooting
Viruses and their nasty friends can throw a real wrench in the works. Run a full system scan just to be safe.
Glitches are often caused by out-of-date software. Keep your OS, drivers, and apps updated.
Completely shut down the device, wait a minute, then start it back up. Fixes a surprising number of issues.